81374260 divided by 642 
The aim is to understand the frequency of 642 in 81374260.

Step 1:
8 divided by 642 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 642

On to step 2:
642 goes into 81 0 times with a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Grab the next digit (3) from the dividend, add it to 81, then carry on: 813 / 642

Advancing to step 3:
The number 642 fits into 813 1 times, leaving a remainder of 171.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 642 from 813 and we're left with 171.
Grab the next digit (7) from the dividend, add it to 171, then carry on: 1717 / 642

On to step 4:
642 can be fit into 1717 2 times, resulting in a remainder of 433.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
The remainder is 433 after subtracting 1284 from 1717.
Fetch the next digit (4) from the dividend, attach it to 433 and continue: 4334 / 642

Advancing to step 5:
4334 divided by 642 is 6 with a remainder of 482.
Record the quotient 6 as the next digit in the result. 
Result so far: 126.0
The remainder is 482 after subtracting 3852 from 4334.
Take the next digit (2) from the dividend and append it to 482, then repeat: 4822 / 642

On to step 6:
642 can be fit into 4822 7 times, resulting in a remainder of 328.
The number 7 becomes the next digit in our result. 
Result so far: 1267.0
Deduct 4494 from 4822 and we're left with 328.
Take the next digit (6) from the dividend and append it to 328, then repeat: 3286 / 642

Going ahead to step 7:
3286 divided by 642 is 5 with a remainder of 76.
The number 5 becomes the next digit in our result. 
Result so far: 12675.0
Subtracting 3210 from 3286 leaves us with 76.
Include the next digit (0) from the dividend after 76, then repeat: 760 / 642

Going ahead to step 8:
760 divided by 642 is 1 with a remainder of 118.
Record the quotient 1 as the next digit in the result. 
Result so far: 126751.0
Deduct 642 from 760 and we're left with 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Moving on to step 9:
1180 divided by 642 is 1 with a remainder of 538.
The number 1 becomes the next digit in our result. 
Result so far: 126751.1
Subtract 642 from 1180 to get 538.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5380, and continue the process.

Let's proceed to step 10:
The number 642 fits into 5380 8 times, leaving a remainder of 244.
Record the quotient 8 as the next digit in the result. 
Result so far: 126751.18
Deduct 5136 from 5380 and we're left with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Advancing to step 11:
If we divide 2440 by 642, we get 3 and a remainder of 514.
The next digit of our result is 3. 
Result so far: 126751.183
If we subtract 1926 from 2440, we get 514.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5140, and continue the process.

Let's proceed to step 12:
642 can be fit into 5140 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 126751.1838
Subtract 5136 from 5140 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 13:
642 can be fit into 40 0 times, resulting in a remainder of 40.
Write down 0 as next digit of the result. 
Result so far: 126751.1838
Subtract 0 from 40 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 14:
642 can be fit into 400 0 times, resulting in a remainder of 400.
Use 0 as the next digit of our solution. 
Result so far: 126751.1838
The remainder is 400 after subtracting 0 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final outcome is 126751.1838, with a leftover of 4e-05.